Changes and Attributions of Runoff in the Source Region of the Yangtze River from 1960 to 2020
Water is the source of life,the variation of runoff is an important factor in measuring the quantity of water resources.The source region of the Yangtze River is an important global water conservation region,and the changes in runoff in the source region of the Yangtze River affect the changes in available water resources throughout the country.The linear trend method,Mann Kendall test method,R/S analysis method,coefficient of variation method,and cumulative anomaly method were used to analyze the evolution law of runoff in the source region of the Yangtze River,and PLS-SEM method was combined to perform attribution analysis on the changes in runoff.The results showed that:①the annual distribution of runoff in the source region of the Yangtze River was uneven,with significant seasonal differences;②from 1960 to 2020,the runoff in the source region of the Yangtze River showed an increasing trend.③the runoff in the source region of the Yangtze River experienced a sudden change in 2009,with precipitation,temperature,surface temperature and human activity factors being the main factors causing the change.The analysis results help to understand the evolution law and influencing factors of the Yangtze River source runoff,and provide a certain scientific basis for the sustainable development of water resources in the basin.
source region of the Yangtze Riverrunoffattribution analysisPLS-SEMmutation test
万方数据
